jennite

Also known as IMA1965-021

Jennite is a calcium silicate hydrate mineral of general chemical formula: Ca9Si6O18(OH)6·8H2O.

Key facts

Mineral.name: Jennite
Mineral.category: Silicate mineral
Mineral.image: Jennite_CSH_3D_Crystal_Structure_RasMol.gif
Mineral.imagesize: 260px
Mineral.caption: Crystal structure of jennite: elementary unit cell viewed in 3D
Mineral.formula: Ca9Si6O18(OH)6·8H2O
Mineral.IMAsymbol: Jnn
Mineral.molweight: 1,063 g/mol
Mineral.strunz: 9.DG.20
Mineral.system: Triclinic
Mineral.class: Pinacoidal () (same H-M symbol)
Mineral.symmetry: P
Mineral.unit cell: a = 10.56, b = 7.25 c = 10.81 [Å]; α = 99.7° β = 97.67°, γ = 110.07°; Z = 1
Mineral.color: White
Mineral.habit: Blade shaped crystals, fibrous aggregates, platy – sheet forms
Mineral.cleavage: Distinct on [001]
Mineral.mohs: 3.5
Mineral.luster: Vitreous (glassy)

via Wikipedia infobox

Wikidata facts

Image: Jennite.jpg

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Nickel-Strunz '10th ed', review of (9th ed/ 2009 update): 9.DG.20
Nickel-Strunz 9th edition (updated 2009): 9.DG.20
Commons category: Jennite
IMA Mineral Symbol: Jnn
chemical formula: Ca₉Si₆O₁₆(OH)₁₀·6H₂O
Strunz 8th edition (series ID, updated): VIII/B.21

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Cement chemistry
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References
Further reading

Jennite is a calcium silicate hydrate mineral of general chemical formula: Ca9Si6O18(OH)6·8H2O.

Jennite occurs as an alteration mineral in metamorphosed limestone and skarn. It typically occurs as vein and open space fillings as a late mineral phase. It also occurs in hydrated cement paste.